ML20128E059

Discusses Tdi Diesel Generator Operating Restrictions. Generic Resolution of Adequacy of V-16 Crankshaft for full-rated Load & Overload Not Established.Engine Testing at Loads Greater than 185 Psig Approved

ML20128E059
Person / Time
Site:	Comanche Peak
Issue date:	06/25/1985
From:	Noonan V NRC - COMANCHE PEAK PROJECT (TECHNICAL REVIEW TEAM)
To:	Spence M TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
References
NUDOCS 8507050248
Download: ML20128E059 (4)

Text

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1. g UNITED STATES

[ g - NUCLEAR REGULATORY COMMISSION y j WASHINGTON, D. C. 20555

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Docket Nos.: 50-445 and 50-446 Mr. M. D. Spence President Texas Utilities Generating Company 400 N. Olive St., L.B. 81 Dallas, Texas 75201

Subject:

TDI Diesel Generator Operating Restrictions - Comanche Peak Ref: (1 Letter dated January 18, 1985 from Beck (TUGCO) to Denton (NRC)

(2 Letter dated August 13, 1984 from Eisenhut (NRC) to George (TUGCO)

(3 Letter dated March 25, 1985 from Youngblood (NRC) to Edelman (Cleveland Electric Illuminating Company)

In Reference 1, you requested that the staff relieve Texas Utilities of the currently imposed operating restrictions on the TDI diesel generators at Comanche Peak. Specifically, you requested that the engine load limitation of 185 psig BMEP be removed, thus permitting operation of the diesels at rated load (7000 kw) and at overload capacity (7700 kw) and that document requirements such as operating procedures and technical specifications related to the 185 psig BMEP load limitation be eliminated. To justify removal of the load limit, you cited progress of the Owners Group program, actions taken by Texas Utilities to en-hance and verify engine reliability and establishment of an acceptable diesel generator maintenance and surveillance program.

One of the primary reasons that caused the staff to impose a load limitation on the engines was the staff concern regarding the adequacy of the crankshaft for full-rated load and overload (Reference 2). While the staff agrees that much progress has been made by the Owner's Group in resolving TDI engine issues, generic resolution of the adequacy of the V-16 crankshaft for full-rated load and overload has not yet been established. The staff's Phase 1 SER on the V-16 crankshaft has not been completed because the staff has not received the results of the torsiograph tests which include cylinder imbalance that were conducted at Perry. Although torsiograph tests were performed on all engines, including those at Comanche Peak, as part of the Owners Group program, only

- the torsiograph tests that were conducted at Perry included the effects of cylinder imbalance. The staff intends to use the results of the forsiograph tests which include cylinder imbalance in arriving at a conclusion regarding the adequacy of the V-16 crankshaft for full-rated load and overload.

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,- a Mr. M. D. Spence JUN 2 51985 Even though the staff cannot presently approve indefinite diesel engine oper-ation above 185 psig BMEP due to crankshaft concerns, the staff has previously approved operation of the Perry engines at full-rated load during the initial 100 hour0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> break-in run with the requirement that the most heavily stressed crankshaft journals be inspected in the region of the oil holes upon com-pletion of the run (Reference 3). Similarly, Texas Utilities may conduct engine testing at loads greater than 185 psig up to overload with the under-standing that additional crankshaft inspections may subsequently be required depending on the outcome of the staff's review of the Phase 1 report on V-16 crankshafts submitted by the Owners Group.

Sincerely, ORIGDIAL SlusuW DY Vincent S. Noonan, Director for Comanche Peak Project Division of Licensing Office of Nuclear Reactor Regulation ec: See next page DTSTRIBUT

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JUN 2 51985 Mr. M. D. Spence Comanche Peak Steam Electric Station Texas Utilities Generating Company Units 1 and 2 cc:

Nicholas S. Reynolds, Esq. Resident Inspector / Comanche Peak Bishop, Liberman, Cook, Nuclear Power Station Purcell & Reynolds c/o U.S. Nuclear Regulatory Commission 1200 Seventeenth Street, NW P. O. Box 38 Washington, D.C. 20036 Glen Rose, Texas 76043 Robert A. Wooldridge, Esq. Regional Administrator, Region IV Worsham, Forsythe, Sampels & U.S. Nuclear Regulatory Commission Wooldridge 611 Ryan Plaza Drive, Suite 1000 2001 Bryan Tower, Suite 2500 Arlington, Texas 76011 Dallas, Texas 75201 Mr. Homer C. Schmidt Larry A. Sinkin Manager - Nuclear Services 3022 Porter Street, NW #304 Texas Utilities Generating Company Washington, D.C. 20008 Skyway Tower 400 North Olive Street, LB#81 Dallas, Texas 75201 Mr. Robert E. Ballard, Jr. B. R. Clements Director of Projects Vice President - Nuclear Gibbs and Hill, Inc. Texas Utilities Generating Company 11 Pen Plaza Skyway Tower New York, New York 10001 400 North Olive Street, LB#81 Dallas, Texas 75201 Mr. A. T. Parker Ms. Billie Pirner Garde Westinghouse Electric Corporation Citizens Clinic Director P. O. Box 355 Government Accountability Project Pittsburgh, Pennsylvania 15230 1901 Que Street, NW Washington, D.C. 20009 Renea Hicks, Esq.

Assistant Attorney General David R. Pigott, Esq.

Environmental Protection Division Orrick, Herrington & Sutcliffe P. O. Box 12548, Capitol Station 600 Montgomery Street Austin, Texas 78711 San Francisco, California 94111 Mrs. Juanita Ellis, President Anthony Z. Roisman, Esq.

Citizens Association for Sound Energy Trial Lawyers fcr Public Justice 1426 South Polk 2000 P. Street, NW Dallas, Texas 75224 Suite 611 Washington, D.C. 20036' Ms. Nancy H. Williams CYGNA 101 California Street San Francisco, California 94111 -

, JUN 2 51985 Texas Utilities Electric Company -

2- Comanche Peak Electric Station-Units 1 and 2 cc:

Resident Inspector - Comanche Peak c/o U.S. Nuclear Regulatory Conmission P. O. Box 1029 Granbury.. Texas 76048 Mr. -John W. Beck Manager - Licensing Texas Utilities Electric Company i Skyway Tower 400 N. Olive Street, LB#81 Dallas, Texas 75201 T

Mr. Jack Redding Licensing Texas Utilities Generating Company 4901 Fairmont Avenue Bethesda, Maryland 20814 William A. Burchette, Esq.

Heron, Burchette, Ruckert & Rothwell Suite 700 1025 Thomas Jefferson Street, NW Washington, D.C. 20007 4

Mr. James McGaughy Southern Engineering Company of Georgia 1800 Peachtree, Street, NW Atlanta, Georgia 30367-8301 f

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